www-servers/nginx: Rev bump of "mainline" slot to add/update modules

www-servers/nginx: Rev bump of "mainline" slot to add/update modules

Ebuild changes:
===============
- LDAP auth module bumped to commit 42d195d7a7575ebab1c369ad3fc5d78dc2c2669c
  to add OpenSSL 1.1.x support and other bugfixes.

- HTTP upstream check module bumped to commit 9aecf15ec379fe98f62355c57b60c0bc83296f04
  to fix possible segfault when reloading configuration.

- Virtual host traffic status module added.

- nginScript module added. [PR 3200]

- Brotli module added. [Bug 628898]

See: https://github.com/gentoo/gentoo/pull/3200
Closes: https://bugs.gentoo.org/628898
Package-Manager: Portage-2.3.24, Repoman-2.3.6